Respiratory mask



FIG. 1 is a front perspective view of a respiratory mask according to a first embodiment showing our new design;

FIG. 2 is a front view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a top view thereof;

FIG. 5 is a bottom view thereof;

FIG. 6 is a left side view thereof;

FIG. 7 is a right side view thereof;

FIG. 8 is a front perspective view of a respiratory mask according to a second embodiment showing our new design;

FIG. 9 is a front view thereof;

FIG. 10 is a rear view thereof;

FIG. 11 is a top view thereof;

FIG. 12 is a bottom view thereof;

FIG. 13 is a left side view thereof; and,

FIG. 14 is a right side view thereof.

The broken lines depict portions of the respiratory mask that form no part of the claimed design.

Stippling and line shading have been used in the drawings to indicate a contrast in appearance. 

CLAIM The ornamental design for a respiratory mask, as shown and described. 